Nullable Enumeration

Used to specify the way null values are stored.

Syntax

Visual Basic

'Declaration
 
Public Enum Nullable 
   Inherits System.Enum

C#

public enum Nullable : System.Enum 

Members

Member	Description
Automatic	Automatic. Data stored as null if allowed, otherwise as empty string.
Disallow	Column doesn't allow empty values.
EmptyString	Empty String. Data stored as a zero-length string.
Nothing	Nothing. Data stored as Nothing (C# null).
Null	DBNull. Data stored as DBNull value.

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2